My main takeaways from this very interesting book (published in 2006) on the importance of omega 3 fatty acids in our diets:
-all kinds of fats (saturated fats/monounsaturated fats, polyunsaturated fats such as omega 6 and omega 3) are important and perform essential functions in our body. Key is the ratios and balance between them.
- Until not so long ago (beginning of 20th century), humans used to cook with either tallow, lard and butter (mostly saturated fats) or olive oil (mostly monounsaturated fat).
- At the beginning of the 20th century the chemical processing and refining methods of vegetable oils were invented. People in the West started cooking with the cheaper sunflower, corn, soybean or cottonseed oils.
These vegetable oils consisted mostly of polyunsaturated fats, also known as omega 6 and omega 3 fatty acids.
Omega 3 fats have a very short shelf life and so they were removed from those vegetable oils during processing, leaving only omega 6 fatty acids.
- Around the middle of the twentieth century, processed foods started to get manufactured with those cheap processed oils high in omega 6.
- As the twentieth century progressed, diseases such as heart disease, cancer, arthritis, diabetes etc.. started to increase in industrialized countries.
- Studies showed a connection between the consumption of saturated fats, cholesterol and heart disease.
- The medical field recommended cooking with vegetable oils instead of saturated fats.
They also recommended cutting down on eggs, because, although they are not high in saturated fats, they are high in cholesterol. The correlation between cholesterol in food and heart disease has meanwhile been debunked.
The egg yolk (at least the one from free roaming chickens feeding on grasses, green leaves and insects), besides being rich in many nutrients, is very high in omega 3 fatty acids.
I suppose the eggs on the cover of the book represent the omega 3 fatty acids which have been suppressed from the mainstream Western diet.
One study compared the nutritional value of eggs from chickens in Greece who were free roaming and ate a lot of purslane, high in omega 3, with eggs from American factory farm raised chickens fed with corn. The American eggs had only 1/10th of the omega 3 fatty acids compared to the Greek eggs (besides having lower amounts of many other nutrients).
- As a consequence of the increased use of highly processed vegetable oils as cooking oils and the increased consumption of processed foods drenched with those vegetable oils, the amount of omega 6 fatty acids has increased dramatically in populations who eat Western diets while the amount of omega 3 fatty acids has decreased.
- Studies have shown that the increase in consumption of omega 6 fatty acids and the decrease in availability of omega 3 fatty acids is connected to the increase in many chronic diseases.
- Studies have also shown that a decrease in consumption of saturated fats coupled with an increase in omega 6, does not lead to a decrease in heart disease.
On the other hand, studies have shown that a decrease in consumption of saturated fats coupled with an increase of omega 3 reduces the incidence of heart disease.
- So the solution would logically be to just add omega 3 to one's diet, in the form of more omega 3 rich fish, fish oils, and/or omega 3 rich plant foods such as flax seeds and chia seeds?
- No, says the author. Besides eating more omega 3 rich foods, we need to drastically reduce the consumption of omega 6 rich foods such as vegetable oils and processed foods and this is (one of the many) reason(s) why:
A preponderance of omega 6 fatty acids in the body inhibits the absorption of omega 3 fatty acids!
This metabolic fact was only discovered around the 1980s.
The consumption of saturated fats, on the other hand, does not compete for absorption with omega 3s.
- So here is the bottom line:
Avoid consumption of omega 6 rich vegetable oils.
Cooking with olive oil is to be preferred. Even a bit of butter seems healthier than vegetable oils.
Avoid consumption of processed foods.
Eat omega 3 rich fish ( salmon, tuna, sardines, herring) a couple of times a week. Be careful however with fish oil supplements that could have dangerous concentrations of mercury, PCBs and other toxins.
Cut down on saturated fats but do eat organic eggs from free roaming chickens.
Eat omega 3 rich seeds, nuts and vegetables. ( flax seeds, chia seeds, walnuts, soy beans, seaweed.) Note however that the body needs to convert the ALA in those foods into DHA and EPA, which it does not do as efficiently as when it absorbs omega 3 from fish sources.
Do not pay attention to pronouncements sponsored by the meat, dairy, vegetable oil and processed foods industries.